//
// FILE NAME: CIDCrypto_Blowfish.cpp
//
// AUTHOR: Dean Roddey
//
// CREATED: 10/23/1997
//
// COPYRIGHT: Charmed Quark Systems, Ltd @ 2019
//
//  This software is copyrighted by 'Charmed Quark Systems, Ltd' and
//  the author (Dean Roddey.) It is licensed under the MIT Open Source
//  license:
//
//  https://opensource.org/licenses/MIT
//
// DESCRIPTION:
//
//  This file implements the Blowfish encryption scheme.
//
// CAVEATS/GOTCHAS:
//
// LOG:
//
//  $_CIDLib_Log_$
//


// ---------------------------------------------------------------------------
//  Facility specific includes
// ---------------------------------------------------------------------------
#include    "CIDCrypto_.hpp"


// ---------------------------------------------------------------------------
//  Do our RTTI macros
// ---------------------------------------------------------------------------
RTTIDecls(TBlowfishEncrypter,TBlockEncrypter)


// ---------------------------------------------------------------------------
//  Some macros to simplify the rounds. These are not terribly easy to
//  debug and understand but they do make for a lot less code and I'm just
//  using a reference implementation anyway, so I'm taking their word for it
//  that it works!
// ---------------------------------------------------------------------------
#define SBox(x,i) (m_ac4SBox[i][x.Fields.c4Byte##i])
#define Fiestel(x) (((SBox(x,0) + SBox(x,1)) ^ SBox(x,2)) + SBox(x,3))
#define Round(a,b,n) (a.c4Val ^= Fiestel(b) ^ m_ac4PArray[n])



namespace CIDCrypto_Blowfish
{
    // ---------------------------------------------------------------------------
    //  Local, const data
    //
    //  ac4KeySched0
    //  ac4KeySched1
    //  ac4KeySched2
    //  ac4KeySched3
    //      These are the key schedule arrays. These are used to take the user's
    //      key and create a large number of very scrambled sub keys. These
    //      subkeys are used for the actual encryption/decryption. These are
    //      the initial values which are used for setup during construction.
    //
    //  apc4PInit
    //      The initialization values for the permutation blocks. These are used
    //      for setup during construction.
    //
    //  c4MinKeyBits
    //  c4MaxKeyBits
    //      The minimum and maximum number of bits that a key can have for this
    //      class.
    // ---------------------------------------------------------------------------
    const tCIDLib::TCard4   ac4KeySched0[256] =
    {
          0xD1310BA6, 0x98DFB5AC, 0x2FFD72DB, 0xD01ADFB7
        , 0xB8E1AFED, 0x6A267E96, 0xBA7C9045, 0xF12C7F99
        , 0x24A19947, 0xB3916CF7, 0x0801F2E2, 0x858EFC16
        , 0x636920D8, 0x71574E69, 0xA458FEA3, 0xF4933D7E
        , 0x0D95748F, 0x728EB658, 0x718BCD58, 0x82154AEE
        , 0x7B54A41D, 0xC25A59B5, 0x9C30D539, 0x2AF26013
        , 0xC5D1B023, 0x286085F0, 0xCA417918, 0xB8DB38EF
        , 0x8E79DCB0, 0x603A180E, 0x6C9E0E8B, 0xB01E8A3E
        , 0xD71577C1, 0xBD314B27, 0x78AF2FDA, 0x55605C60
        , 0xE65525F3, 0xAA55AB94, 0x57489862, 0x63E81440
        , 0x55CA396A, 0x2AAB10B6, 0xB4CC5C34, 0x1141E8CE
        , 0xA15486AF, 0x7C72E993, 0xB3EE1411, 0x636FBC2A
        , 0x2BA9C55D, 0x741831F6, 0xCE5C3E16, 0x9B87931E
        , 0xAFD6BA33, 0x6C24CF5C, 0x7A325381, 0x28958677
        , 0x3B8F4898, 0x6B4BB9AF, 0xC4BFE81B, 0x66282193
        , 0x61D809CC, 0xFB21A991, 0x487CAC60, 0x5DEC8032
        , 0xEF845D5D, 0xE98575B1, 0xDC262302, 0xEB651B88
        , 0x23893E81, 0xD396ACC5, 0x0F6D6FF3, 0x83F44239
        , 0x2E0B4482, 0xA4842004, 0x69C8F04A, 0x9E1F9B5E
        , 0x21C66842, 0xF6E96C9A, 0x670C9C61, 0xABD388F0
        , 0x6A51A0D2, 0xD8542F68, 0x960FA728, 0xAB5133A3
        , 0x6EEF0B6C, 0x137A3BE4, 0xBA3BF050, 0x7EFB2A98
        , 0xA1F1651D, 0x39AF0176, 0x66CA593E, 0x82430E88
        , 0x8CEE8619, 0x456F9FB4, 0x7D84A5C3, 0x3B8B5EBE
        , 0xE06F75D8, 0x85C12073, 0x401A449F, 0x56C16AA6
        , 0x4ED3AA62, 0x363F7706, 0x1BFEDF72, 0x429B023D
        , 0x37D0D724, 0xD00A1248, 0xDB0FEAD3, 0x49F1C09B
        , 0x075372C9, 0x80991B7B, 0x25D479D8, 0xF6E8DEF7
        , 0xE3FE501A, 0xB6794C3B, 0x976CE0BD, 0x04C006BA
        , 0xC1A94FB6, 0x409F60C4, 0x5E5C9EC2, 0x196A2463
        , 0x68FB6FAF, 0x3E6C53B5, 0x1339B2EB, 0x3B52EC6F
        , 0x6DFC511F, 0x9B30952C, 0xCC814544, 0xAF5EBD09
        , 0xBEE3D004, 0xDE334AFD, 0x660F2807, 0x192E4BB3
        , 0xC0CBA857, 0x45C8740F, 0xD20B5F39, 0xB9D3FBDB
        , 0x5579C0BD, 0x1A60320A, 0xD6A100C6, 0x402C7279
        , 0x679F25FE, 0xFB1FA3CC, 0x8EA5E9F8, 0xDB3222F8
        , 0x3C7516DF, 0xFD616B15, 0x2F501EC8, 0xAD0552AB
        , 0x323DB5FA, 0xFD238760, 0x53317B48, 0x3E00DF82
        , 0x9E5C57BB, 0xCA6F8CA0, 0x1A87562E, 0xDF1769DB
        , 0xD542A8F6, 0x287EFFC3, 0xAC6732C6, 0x8C4F5573
        , 0x695B27B0, 0xBBCA58C8, 0xE1FFA35D, 0xB8F011A0
        , 0x10FA3D98, 0xFD2183B8, 0x4AFCB56C, 0x2DD1D35B
        , 0x9A53E479, 0xB6F84565, 0xD28E49BC, 0x4BFB9790
        , 0xE1DDF2DA, 0xA4CB7E33, 0x62FB1341, 0xCEE4C6E8
        , 0xEF20CADA, 0x36774C01, 0xD07E9EFE, 0x2BF11FB4
        , 0x95DBDA4D, 0xAE909198, 0xEAAD8E71, 0x6B93D5A0
        , 0xD08ED1D0, 0xAFC725E0, 0x8E3C5B2F, 0x8E7594B7
        , 0x8FF6E2FB, 0xF2122B64, 0x8888B812, 0x900DF01C
        , 0x4FAD5EA0, 0x688FC31C, 0xD1CFF191, 0xB3A8C1AD
        , 0x2F2F2218, 0xBE0E1777, 0xEA752DFE, 0x8B021FA1
        , 0xE5A0CC0F, 0xB56F74E8, 0x18ACF3D6, 0xCE89E299
        , 0xB4A84FE0, 0xFD13E0B7, 0x7CC43B81, 0xD2ADA8D9
        , 0x165FA266, 0x80957705, 0x93CC7314, 0x211A1477
        , 0xE6AD2065, 0x77B5FA86, 0xC75442F5, 0xFB9D35CF
        , 0xEBCDAF0C, 0x7B3E89A0, 0xD6411BD3, 0xAE1E7E49
        , 0x00250E2D, 0x2071B35E, 0x226800BB, 0x57B8E0AF
        , 0x2464369B, 0xF009B91E, 0x5563911D, 0x59DFA6AA
        , 0x78C14389, 0xD95A537F, 0x207D5BA2, 0x02E5B9C5
        , 0x83260376, 0x6295CFA9, 0x11C81968, 0x4E734A41
        , 0xB3472DCA, 0x7B14A94A, 0x1B510052, 0x9A532915
        , 0xD60F573F, 0xBC9BC6E4, 0x2B60A476, 0x81E67400
        , 0x08BA6FB5, 0x571BE91F, 0xF296EC6B, 0x2A0DD915
        , 0xB6636521, 0xE7B9F9B6, 0xFF34052E, 0xC5855664
        , 0x53B02D5D, 0xA99F8FA1, 0x08BA4799, 0x6E85076A
    };

    const tCIDLib::TCard4   ac4KeySched1[256] =
    {
          0x4B7A70E9, 0xB5B32944, 0xDB75092E, 0xC4192623
        , 0xAD6EA6B0, 0x49A7DF7D, 0x9CEE60B8, 0x8FEDB266
        , 0xECAA8C71, 0x699A17FF, 0x5664526C, 0xC2B19EE1
        , 0x193602A5, 0x75094C29, 0xA0591340, 0xE4183A3E
        , 0x3F54989A, 0x5B429D65, 0x6B8FE4D6, 0x99F73FD6
        , 0xA1D29C07, 0xEFE830F5, 0x4D2D38E6, 0xF0255DC1
        , 0x4CDD2086, 0x8470EB26, 0x6382E9C6, 0x021ECC5E
        , 0x09686B3F, 0x3EBAEFC9, 0x3C971814, 0x6B6A70A1
        , 0x687F3584, 0x52A0E286, 0xB79C5305, 0xAA500737
        , 0x3E07841C, 0x7FDEAE5C, 0x8E7D44EC, 0x5716F2B8
        , 0xB03ADA37, 0xF0500C0D, 0xF01C1F04, 0x0200B3FF
        , 0xAE0CF51A, 0x3CB574B2, 0x25837A58, 0xDC0921BD
        , 0xD19113F9, 0x7CA92FF6, 0x94324773, 0x22F54701
        , 0x3AE5E581, 0x37C2DADC, 0xC8B57634, 0x9AF3DDA7
        , 0xA9446146, 0x0FD0030E, 0xECC8C73E, 0xA4751E41
        , 0xE238CD99, 0x3BEA0E2F, 0x3280BBA1, 0x183EB331
        , 0x4E548B38, 0x4F6DB908, 0x6F420D03, 0xF60A04BF
        , 0x2CB81290, 0x24977C79, 0x5679B072, 0xBCAF89AF
        , 0xDE9A771F, 0xD9930810, 0xB38BAE12, 0xDCCF3F2E
        , 0x5512721F, 0x2E6B7124, 0x501ADDE6, 0x9F84CD87
        , 0x7A584718, 0x7408DA17, 0xBC9F9ABC, 0xE94B7D8C
        , 0xEC7AEC3A, 0xDB851DFA, 0x63094366, 0xC464C3D2
        , 0xEF1C1847, 0x3215D908, 0xDD433B37, 0x24C2BA16
        , 0x12A14D43, 0x2A65C451, 0x50940002, 0x133AE4DD
        , 0x71DFF89E, 0x10314E55, 0x81AC77D6, 0x5F11199B
        , 0x043556F1, 0xD7A3C76B, 0x3C11183B, 0x5924A509
        , 0xF28FE6ED, 0x97F1FBFA, 0x9EBABF2C, 0x1E153C6E
        , 0x86E34570, 0xEAE96FB1, 0x860E5E0A, 0x5A3E2AB3
        , 0x771FE71C, 0x4E3D06FA, 0x2965DCB9, 0x99E71D0F
        , 0x803E89D6, 0x5266C825, 0x2E4CC978, 0x9C10B36A
        , 0xC6150EBA, 0x94E2EA78, 0xA5FC3C53, 0x1E0A2DF4
        , 0xF2F74EA7, 0x361D2B3D, 0x1939260F, 0x19C27960
        , 0x5223A708, 0xF71312B6, 0xEBADFE6E, 0xEAC31F66
        , 0xE3BC4595, 0xA67BC883, 0xB17F37D1, 0x018CFF28
        , 0xC332DDEF, 0xBE6C5AA5, 0x65582185, 0x68AB9802
        , 0xEECEA50F, 0xDB2F953B, 0x2AEF7DAD, 0x5B6E2F84
        , 0x1521B628, 0x29076170, 0xECDD4775, 0x619F1510
        , 0x13CCA830, 0xEB61BD96, 0x0334FE1E, 0xAA0363CF
        , 0xB5735C90, 0x4C70A239, 0xD59E9E0B, 0xCBAADE14
        , 0xEECC86BC, 0x60622CA7, 0x9CAB5CAB, 0xB2F3846E
        , 0x648B1EAF, 0x19BDF0CA, 0xA02369B9, 0x655ABB50
        , 0x40685A32, 0x3C2AB4B3, 0x319EE9D5, 0xC021B8F7
        , 0x9B540B19, 0x875FA099, 0x95F7997E, 0x623D7DA8
        , 0xF837889A, 0x97E32D77, 0x11ED935F, 0x16681281
        , 0x0E358829, 0xC7E61FD6, 0x96DEDFA1, 0x7858BA99
        , 0x57F584A5, 0x1B227263, 0x9B83C3FF, 0x1AC24696
        , 0xCDB30AEB, 0x532E3054, 0x8FD948E4, 0x6DBC3128
        , 0x58EBF2EF, 0x34C6FFEA, 0xFE28ED61, 0xEE7C3C73
        , 0x5D4A14D9, 0xE864B7E3, 0x42105D14, 0x203E13E0
        , 0x45EEE2B6, 0xA3AAABEA, 0xDB6C4F15, 0xFACB4FD0
        , 0xC742F442, 0xEF6ABBB5, 0x654F3B1D, 0x41CD2105
        , 0xD81E799E, 0x86854DC7, 0xE44B476A, 0x3D816250
        , 0xCF62A1F2, 0x5B8D2646, 0xFC8883A0, 0xC1C7B6A3
        , 0x7F1524C3, 0x69CB7492, 0x47848A0B, 0x5692B285
        , 0x095BBF00, 0xAD19489D, 0x1462B174, 0x23820E00
        , 0x58428D2A, 0x0C55F5EA, 0x1DADF43E, 0x233F7061
        , 0x3372F092, 0x8D937E41, 0xD65FECF1, 0x6C223BDB
        , 0x7CDE3759, 0xCBEE7460, 0x4085F2A7, 0xCE77326E
        , 0xA6078084, 0x19F8509E, 0xE8EFD855, 0x61D99735
        , 0xA969A7AA, 0xC50C06C2, 0x5A04ABFC, 0x800BCADC
        , 0x9E447A2E, 0xC3453484, 0xFDD56705, 0x0E1E9EC9
        , 0xDB73DBD3, 0x105588CD, 0x675FDA79, 0xE3674340
        , 0xC5C43465, 0x713E38D8, 0x3D28F89E, 0xF16DFF20
        , 0x153E21E7, 0x8FB03D4A, 0xE6E39F2B, 0xDB83ADF7
    };

    const tCIDLib::TCard4   ac4KeySched2[256] =
    {
          0xE93D5A68, 0x948140F7, 0xF64C261C, 0x94692934
        , 0x411520F7, 0x7602D4F7, 0xBCF46B2E, 0xD4A20068
        , 0xD4082471, 0x3320F46A, 0x43B7D4B7, 0x500061AF
        , 0x1E39F62E, 0x97244546, 0x14214F74, 0xBF8B8840
        , 0x4D95FC1D, 0x96B591AF, 0x70F4DDD3, 0x66A02F45
        , 0xBFBC09EC, 0x03BD9785, 0x7FAC6DD0, 0x31CB8504
        , 0x96EB27B3, 0x55FD3941, 0xDA2547E6, 0xABCA0A9A
        , 0x28507825, 0x530429F4, 0x0A2C86DA, 0xE9B66DFB
        , 0x68DC1462, 0xD7486900, 0x680EC0A4, 0x27A18DEE
        , 0x4F3FFEA2, 0xE887AD8C, 0xB58CE006, 0x7AF4D6B6
        , 0xAACE1E7C, 0xD3375FEC, 0xCE78A399, 0x406B2A42
        , 0x20FE9E35, 0xD9F385B9, 0xEE39D7AB, 0x3B124E8B
        , 0x1DC9FAF7, 0x4B6D1856, 0x26A36631, 0xEAE397B2
        , 0x3A6EFA74, 0xDD5B4332, 0x6841E7F7, 0xCA7820FB
        , 0xFB0AF54E, 0xD8FEB397, 0x454056AC, 0xBA489527
        , 0x55533A3A, 0x20838D87, 0xFE6BA9B7, 0xD096954B
        , 0x55A867BC, 0xA1159A58, 0xCCA92963, 0x99E1DB33
        , 0xA62A4A56, 0x3F3125F9, 0x5EF47E1C, 0x9029317C
        , 0xFDF8E802, 0x04272F70, 0x80BB155C, 0x05282CE3
        , 0x95C11548, 0xE4C66D22, 0x48C1133F, 0xC70F86DC
        , 0x07F9C9EE, 0x41041F0F, 0x404779A4, 0x5D886E17
        , 0x325F51EB, 0xD59BC0D1, 0xF2BCC18F, 0x41113564
        , 0x257B7834, 0x602A9C60, 0xDFF8E8A3, 0x1F636C1B
        , 0x0E12B4C2, 0x02E1329E, 0xAF664FD1, 0xCAD18115
        , 0x6B2395E0, 0x333E92E1, 0x3B240B62, 0xEEBEB922
        , 0x85B2A20E, 0xE6BA0D99, 0xDE720C8C, 0x2DA2F728
        , 0xD0127845, 0x95B794FD, 0x647D0862, 0xE7CCF5F0
        , 0x5449A36F, 0x877D48FA, 0xC39DFD27, 0xF33E8D1E
        , 0x0A476341, 0x992EFF74, 0x3A6F6EAB, 0xF4F8FD37
        , 0xA812DC60, 0xA1EBDDF8, 0x991BE14C, 0xDB6E6B0D
        , 0xC67B5510, 0x6D672C37, 0x2765D43B, 0xDCD0E804
        , 0xF1290DC7, 0xCC00FFA3, 0xB5390F92, 0x690FED0B
        , 0x667B9FFB, 0xCEDB7D9C, 0xA091CF0B, 0xD9155EA3
        , 0xBB132F88, 0x515BAD24, 0x7B9479BF, 0x763BD6EB
        , 0x37392EB3, 0xCC115979, 0x8026E297, 0xF42E312D
        , 0x6842ADA7, 0xC66A2B3B, 0x12754CCC, 0x782EF11C
        , 0x6A124237, 0xB79251E7, 0x06A1BBE6, 0x4BFB6350
        , 0x1A6B1018, 0x11CAEDFA, 0x3D25BDD8, 0xE2E1C3C9
        , 0x44421659, 0x0A121386, 0xD90CEC6E, 0xD5ABEA2A
        , 0x64AF674E, 0xDA86A85F, 0xBEBFE988, 0x64E4C3FE
        , 0x9DBC8057, 0xF0F7C086, 0x60787BF8, 0x6003604D
        , 0xD1FD8346, 0xF6381FB0, 0x7745AE04, 0xD736FCCC
        , 0x83426B33, 0xF01EAB71, 0xB0804187, 0x3C005E5F
        , 0x77A057BE, 0xBDE8AE24, 0x55464299, 0xBF582E61
        , 0x4E58F48F, 0xF2DDFDA2, 0xF474EF38, 0x8789BDC2
        , 0x5366F9C3, 0xC8B38E74, 0xB475F255, 0x46FCD9B9
        , 0x7AEB2661, 0x8B1DDF84, 0x846A0E79, 0x915F95E2
        , 0x466E598E, 0x20B45770, 0x8CD55591, 0xC902DE4C
        , 0xB90BACE1, 0xBB8205D0, 0x11A86248, 0x7574A99E
        , 0xB77F19B6, 0xE0A9DC09, 0x662D09A1, 0xC4324633
        , 0xE85A1F02, 0x09F0BE8C, 0x4A99A025, 0x1D6EFE10
        , 0x1AB93D1D, 0x0BA5A4DF, 0xA186F20F, 0x2868F169
        , 0xDCB7DA83, 0x573906FE, 0xA1E2CE9B, 0x4FCD7F52
        , 0x50115E01, 0xA70683FA, 0xA002B5C4, 0x0DE6D027
        , 0x9AF88C27, 0x773F8641, 0xC3604C06, 0x61A806B5
        , 0xF0177A28, 0xC0F586E0, 0x006058AA, 0x30DC7D62
        , 0x11E69ED7, 0x2338EA63, 0x53C2DD94, 0xC2C21634
        , 0xBBCBEE56, 0x90BCB6DE, 0xEBFC7DA1, 0xCE591D76
        , 0x6F05E409, 0x4B7C0188, 0x39720A3D, 0x7C927C24
        , 0x86E3725F, 0x724D9DB9, 0x1AC15BB4, 0xD39EB8FC
        , 0xED545578, 0x08FCA5B5, 0xD83D7CD3, 0x4DAD0FC4
        , 0x1E50EF5E, 0xB161E6F8, 0xA28514D9, 0x6C51133C
        , 0x6FD5C7E7, 0x56E14EC4, 0x362ABFCE, 0xDDC6C837
        , 0xD79A3234, 0x92638212, 0x670EFA8E, 0x406000E0
    };

    static const tCIDLib::TCard4    ac4KeySched3[256] =
    {
          0x3A39CE37, 0xD3FAF5CF, 0xABC27737, 0x5AC52D1B
        , 0x5CB0679E, 0x4FA33742, 0xD3822740, 0x99BC9BBE
        , 0xD5118E9D, 0xBF0F7315, 0xD62D1C7E, 0xC700C47B
        , 0xB78C1B6B, 0x21A19045, 0xB26EB1BE, 0x6A366EB4
        , 0x5748AB2F, 0xBC946E79, 0xC6A376D2, 0x6549C2C8
        , 0x530FF8EE, 0x468DDE7D, 0xD5730A1D, 0x4CD04DC6
        , 0x2939BBDB, 0xA9BA4650, 0xAC9526E8, 0xBE5EE304
        , 0xA1FAD5F0, 0x6A2D519A, 0x63EF8CE2, 0x9A86EE22
        , 0xC089C2B8, 0x43242EF6, 0xA51E03AA, 0x9CF2D0A4
        , 0x83C061BA, 0x9BE96A4D, 0x8FE51550, 0xBA645BD6
        , 0x2826A2F9, 0xA73A3AE1, 0x4BA99586, 0xEF5562E9
        , 0xC72FEFD3, 0xF752F7DA, 0x3F046F69, 0x77FA0A59
        , 0x80E4A915, 0x87B08601, 0x9B09E6AD, 0x3B3EE593
        , 0xE990FD5A, 0x9E34D797, 0x2CF0B7D9, 0x022B8B51
        , 0x96D5AC3A, 0x017DA67D, 0xD1CF3ED6, 0x7C7D2D28
        , 0x1F9F25CF, 0xADF2B89B, 0x5AD6B472, 0x5A88F54C
        , 0xE029AC71, 0xE019A5E6, 0x47B0ACFD, 0xED93FA9B
        , 0xE8D3C48D, 0x283B57CC, 0xF8D56629, 0x79132E28
        , 0x785F0191, 0xED756055, 0xF7960E44, 0xE3D35E8C
        , 0x15056DD4, 0x88F46DBA, 0x03A16125, 0x0564F0BD
        , 0xC3EB9E15, 0x3C9057A2, 0x97271AEC, 0xA93A072A
        , 0x1B3F6D9B, 0x1E6321F5, 0xF59C66FB, 0x26DCF319
        , 0x7533D928, 0xB155FDF5, 0x03563482, 0x8ABA3CBB
        , 0x28517711, 0xC20AD9F8, 0xABCC5167, 0xCCAD925F
        , 0x4DE81751, 0x3830DC8E, 0x379D5862, 0x9320F991
        , 0xEA7A90C2, 0xFB3E7BCE, 0x5121CE64, 0x774FBE32
        , 0xA8B6E37E, 0xC3293D46, 0x48DE5369, 0x6413E680
        , 0xA2AE0810, 0xDD6DB224, 0x69852DFD, 0x09072166
        , 0xB39A460A, 0x6445C0DD, 0x586CDECF, 0x1C20C8AE
        , 0x5BBEF7DD, 0x1B588D40, 0xCCD2017F, 0x6BB4E3BB
        , 0xDDA26A7E, 0x3A59FF45, 0x3E350A44, 0xBCB4CDD5
        , 0x72EACEA8, 0xFA6484BB, 0x8D6612AE, 0xBF3C6F47
        , 0xD29BE463, 0x542F5D9E, 0xAEC2771B, 0xF64E6370
        , 0x740E0D8D, 0xE75B1357, 0xF8721671, 0xAF537D5D
        , 0x4040CB08, 0x4EB4E2CC, 0x34D2466A, 0x0115AF84
        , 0xE1B00428, 0x95983A1D, 0x06B89FB4, 0xCE6EA048
        , 0x6F3F3B82, 0x3520AB82, 0x011A1D4B, 0x277227F8
        , 0x611560B1, 0xE7933FDC, 0xBB3A792B, 0x344525BD
        , 0xA08839E1, 0x51CE794B, 0x2F32C9B7, 0xA01FBAC9
        , 0xE01CC87E, 0xBCC7D1F6, 0xCF0111C3, 0xA1E8AAC7
        , 0x1A908749, 0xD44FBD9A, 0xD0DADECB, 0xD50ADA38
        , 0x0339C32A, 0xC6913667, 0x8DF9317C, 0xE0B12B4F
        , 0xF79E59B7, 0x43F5BB3A, 0xF2D519FF, 0x27D9459C
        , 0xBF97222C, 0x15E6FC2A, 0x0F91FC71, 0x9B941525
        , 0xFAE59361, 0xCEB69CEB, 0xC2A86459, 0x12BAA8D1
        , 0xB6C1075E, 0xE3056A0C, 0x10D25065, 0xCB03A442
        , 0xE0EC6E0E, 0x1698DB3B, 0x4C98A0BE, 0x3278E964
        , 0x9F1F9532, 0xE0D392DF, 0xD3A0342B, 0x8971F21E
        , 0x1B0A7441, 0x4BA3348C, 0xC5BE7120, 0xC37632D8
        , 0xDF359F8D, 0x9B992F2E, 0xE60B6F47, 0x0FE3F11D
        , 0xE54CDA54, 0x1EDAD891, 0xCE6279CF, 0xCD3E7E6F
        , 0x1618B166, 0xFD2C1D05, 0x848FD2C5, 0xF6FB2299
        , 0xF523F357, 0xA6327623, 0x93A83531, 0x56CCCD02
        , 0xACF08162, 0x5A75EBB5, 0x6E163697, 0x88D273CC
        , 0xDE966292, 0x81B949D0, 0x4C50901B, 0x71C65614
        , 0xE6C6C7BD, 0x327A140A, 0x45E1D006, 0xC3F27B9A
        , 0xC9AA53FD, 0x62A80F00, 0xBB25BFE2, 0x35BDD2F6
        , 0x71126905, 0xB2040222, 0xB6CBCF7C, 0xCD769C2B
        , 0x53113EC0, 0x1640E3D3, 0x38ABBD60, 0x2547ADF0
        , 0xBA38209C, 0xF746CE76, 0x77AFA1C5, 0x20756060
        , 0x85CBFE4E, 0x8AE88DD8, 0x7AAAF9B0, 0x4CF9AA7E
        , 0x1948C25C, 0x02FB8A8C, 0x01C36AE4, 0xD6EBE1F9
        , 0x90D4F869, 0xA65CDEA0, 0x3F09252D, 0xC208E69F
        , 0xB74E6132, 0xCE77E25B, 0x578FDFE3, 0x3AC372E6
    };

    const tCIDLib::TCard4    ac4PInit[18] =
    {
        0x243F6A88, 0x85A308D3, 0x13198A2E, 0x03707344,
        0xA4093822, 0x299F31D0, 0x082EFA98, 0xEC4E6C89,
        0x452821E6, 0x38D01377, 0xBE5466CF, 0x34E90C6C,
        0xC0AC29B7, 0xC97C50DD, 0x3F84D5B5, 0xB5470917,
        0x9216D5D9, 0x8979FB1B
    };
}


// ---------------------------------------------------------------------------
//   CLASS: TBlowfishEncrypter
//  PREFIX: cryp
// ---------------------------------------------------------------------------

// ---------------------------------------------------------------------------
//  TBlowfishEncrypter: Constructors and Destructor
// ---------------------------------------------------------------------------
TBlowfishEncrypter::TBlowfishEncrypter(const tCIDCrypto::EBlockModes eMode) :

    TBlockEncrypter(TBlowfishEncrypter::c4BlockBytes, eMode)
    , m_ckeyThis()
{
}

TBlowfishEncrypter::TBlowfishEncrypter( const   TCryptoKey&             ckeyToUse
                                        , const tCIDCrypto::EBlockModes eMode) :

    TBlockEncrypter(TBlowfishEncrypter::c4BlockBytes, eMode)
    , m_ckeyThis(ckeyToUse)
{
    // Validate that the key bits count is valid
    if ((ckeyToUse.c4Bytes() * 8 < c4MinKeyBits)
    ||  (ckeyToUse.c4Bytes() * 8 > c4MaxKeyBits))
    {
        facCIDCrypto().ThrowErr
        (
            CID_FILE
            , CID_LINE
            , kCryptoErrs::errcKey_InvalidCount
            , tCIDLib::ESeverities::Failed
            , tCIDLib::EErrClasses::AppError
            , TCardinal(ckeyToUse.c4Bytes() * 8)
            , clsIsA()
        );
    }

    // Initialize all of our data
    ResetImpl();
}

TBlowfishEncrypter::~TBlowfishEncrypter()
{
}


// ---------------------------------------------------------------------------
//  TBlowfishEncrypter: Public, non-virtual methods
// ---------------------------------------------------------------------------
const TCryptoKey& TBlowfishEncrypter::ckeyThis() const
{
    return m_ckeyThis;
}


tCIDLib::TVoid
TBlowfishEncrypter::SetNewKey(  const   TCryptoKey&             ckeyNew
                                , const tCIDCrypto::EBlockModes eNewMode)
{
    // Validate that the key bits count is valid
    if ((ckeyNew.c4Bytes() * 8 < c4MinKeyBits)
    ||  (ckeyNew.c4Bytes() * 8 > c4MaxKeyBits))
    {
        facCIDCrypto().ThrowErr
        (
            CID_FILE
            , CID_LINE
            , kCryptoErrs::errcKey_InvalidCount
            , tCIDLib::ESeverities::Failed
            , tCIDLib::EErrClasses::AppError
            , TCardinal(ckeyNew.c4Bytes() * 8)
            , clsIsA()
        );
    }

    // Looks ok, so store it, and then re-initalize all our tables
    eMode(eNewMode);
    m_ckeyThis = ckeyNew;

    // Initialize all of our data
    ResetImpl();
}


// ---------------------------------------------------------------------------
//  TBlowfishEncrypter: Protected, inherited methods
// ---------------------------------------------------------------------------
tCIDLib::TVoid
TBlowfishEncrypter::DecryptImpl(const   tCIDLib::TCard1* const  pc1Cypher
                                ,       tCIDLib::TCard1* const  pc1Plain)
{
    tCIDLib::TCard4 c4Left;
    tCIDLib::TCard4 c4Right;

    // Get out the next two 32 bit sides of the 64 bit block
    c4Left = *reinterpret_cast<const tCIDLib::TCard4*>(pc1Cypher);
    c4Right = *reinterpret_cast<const tCIDLib::TCard4*>(pc1Cypher+4);

    // If little endian, then byte swap it
    #if defined(CIDLIB_LITTLEENDIAN)
    c4Left = TRawBits::c4SwapBytes(c4Left);
    c4Right = TRawBits::c4SwapBytes(c4Right);
    #endif

    // Decrypt this block
    DecryptBlock(c4Left, c4Right);

    // If little endian byte swap them back
    #if defined(CIDLIB_LITTLEENDIAN)
    c4Left = TRawBits::c4SwapBytes(c4Left);
    c4Right = TRawBits::c4SwapBytes(c4Right);
    #endif

    *reinterpret_cast<tCIDLib::TCard4*>(pc1Plain) = c4Left;
    *reinterpret_cast<tCIDLib::TCard4*>(pc1Plain+4) = c4Right;
}


tCIDLib::TVoid
TBlowfishEncrypter::EncryptImpl(const   tCIDLib::TCard1* const  pc1Plain
                                ,       tCIDLib::TCard1* const  pc1Cypher)
{
    tCIDLib::TCard4 c4Left;
    tCIDLib::TCard4 c4Right;

    // Get out the next two 32 bit sides of the 64 bit block
    c4Left = *reinterpret_cast<const tCIDLib::TCard4*>(pc1Plain);
    c4Right = *reinterpret_cast<const tCIDLib::TCard4*>(pc1Plain+4);

    // If little endian, then byte swap it
    #if defined(CIDLIB_LITTLEENDIAN)
    c4Left = TRawBits::c4SwapBytes(c4Left);
    c4Right = TRawBits::c4SwapBytes(c4Right);
    #endif

    // Decrypt this block
    EncryptBlock(c4Left, c4Right);

    // If little endian byte swap them back
    #if defined(CIDLIB_LITTLEENDIAN)
    c4Left = TRawBits::c4SwapBytes(c4Left);
    c4Right = TRawBits::c4SwapBytes(c4Right);
    #endif

    *reinterpret_cast<tCIDLib::TCard4*>(pc1Cypher) = c4Left;
    *reinterpret_cast<tCIDLib::TCard4*>(pc1Cypher+4) = c4Right;
}


tCIDLib::TVoid TBlowfishEncrypter::ResetImpl()
{
    //
    //  We get the key byte info and a const pointer to the key data, for
    //  fast access.
    //
    const tCIDLib::TCard4 c4KeyBytes = m_ckeyThis.c4Bytes();
    const tCIDLib::TCard1* const pc1Key = m_ckeyThis.pc1Buffer();

    //
    //  First we initialize the S-Boxes, which uses the constant key
    //  scheduling arrays above.
    //
    TRawMem::CopyMemBuf(m_ac4SBox[0], CIDCrypto_Blowfish::ac4KeySched0, sizeof(CIDCrypto_Blowfish::ac4KeySched0));
    TRawMem::CopyMemBuf(m_ac4SBox[1], CIDCrypto_Blowfish::ac4KeySched1, sizeof(CIDCrypto_Blowfish::ac4KeySched1));
    TRawMem::CopyMemBuf(m_ac4SBox[2], CIDCrypto_Blowfish::ac4KeySched2, sizeof(CIDCrypto_Blowfish::ac4KeySched2));
    TRawMem::CopyMemBuf(m_ac4SBox[3], CIDCrypto_Blowfish::ac4KeySched3, sizeof(CIDCrypto_Blowfish::ac4KeySched3));

    //
    //  And now lets initialize the P-Arrays, which uses the key information
    //  to scramble some initial contents.
    //
    tCIDLib::TCard4         c4Index;
    tCIDLib::TCard4         c4KeyIndex = 0;
    tCIDLib::TCard4Union    c4Temp;
    TRawMem::CopyMemBuf(m_ac4PArray, CIDCrypto_Blowfish::ac4PInit, sizeof(m_ac4PArray));
    for (c4Index = 0; c4Index < c4Rounds + 2; c4Index++)
    {
        c4Temp.c4Val = 0;

        c4Temp.Fields.c4Byte0 = pc1Key[c4KeyIndex];
        c4Temp.Fields.c4Byte1 = pc1Key[(c4KeyIndex+1) % c4KeyBytes];
        c4Temp.Fields.c4Byte2 = pc1Key[(c4KeyIndex+2) % c4KeyBytes];
        c4Temp.Fields.c4Byte3 = pc1Key[(c4KeyIndex+3) % c4KeyBytes];
        m_ac4PArray[c4Index] ^= c4Temp.c4Val;
        c4KeyIndex = (c4KeyIndex + 4) % c4KeyBytes;
    }

    //
    //  Now we use the block encrypter to encrypt 0 values interatively
    //  and refill the P-Array with these new values. This loop jumps by
    //  2 through the indexes and sets two entries each loop.
    //
    tCIDLib::TCard4 c4LData = 0;
    tCIDLib::TCard4 c4RData = 0;
    for (c4Index = 0; c4Index < c4Rounds + 2; c4Index += 2)
    {
        EncryptBlock(c4LData, c4RData);
        m_ac4PArray[c4Index] = c4LData;
        m_ac4PArray[c4Index+1] = c4RData;
    }

    //
    //  And now do the same with the S-Boxes. Note that we don't reset
    //  the two data block values, letting them carry over whatever values
    //  where already in them from the last loop!!
    //
    for (c4Index = 0; c4Index < c4NumSBoxes; c4Index++)
    {
        for (tCIDLib::TCard4 c4Inner = 0; c4Inner < c4SBoxSize; c4Inner += 2)
        {
            EncryptBlock(c4LData, c4RData);
            m_ac4SBox[c4Index][c4Inner] = c4LData;
            m_ac4SBox[c4Index][c4Inner+1] = c4RData;
        }
    }
}


// ---------------------------------------------------------------------------
//  TBlowfishEncrypter: Private, non-virtual methods
// ---------------------------------------------------------------------------
tCIDLib::TVoid TBlowfishEncrypter::DecryptBlock(tCIDLib::TCard4&    c4Left
                                                , tCIDLib::TCard4&  c4Right)
{
    tCIDLib::TCard4Union    c4LTmp;
    tCIDLib::TCard4Union    c4RTmp;

    // The params are in and out parms, so get their initial values
    c4LTmp.c4Val = c4Left;
    c4RTmp.c4Val = c4Right;

    // Run the rounds
    c4LTmp.c4Val ^= m_ac4PArray[17];
    Round(c4RTmp, c4LTmp, 16);
    Round (c4LTmp, c4RTmp, 15);
    Round(c4RTmp, c4LTmp, 14);
    Round (c4LTmp, c4RTmp, 13);
    Round(c4RTmp, c4LTmp, 12);
    Round (c4LTmp, c4RTmp, 11);
    Round(c4RTmp, c4LTmp, 10);
    Round (c4LTmp, c4RTmp, 9);
    Round(c4RTmp, c4LTmp, 8);
    Round (c4LTmp, c4RTmp, 7);
    Round(c4RTmp, c4LTmp, 6);
    Round (c4LTmp, c4RTmp, 5);
    Round(c4RTmp, c4LTmp, 4);
    Round (c4LTmp, c4RTmp, 3);
    Round(c4RTmp, c4LTmp, 2);
    Round (c4LTmp, c4RTmp, 1);
    c4RTmp.c4Val ^= m_ac4PArray[0];

    c4Left = c4RTmp.c4Val;
    c4Right = c4LTmp.c4Val;
}


tCIDLib::TVoid TBlowfishEncrypter::EncryptBlock(tCIDLib::TCard4&    c4Left
                                                , tCIDLib::TCard4&  c4Right)
{
    tCIDLib::TCard4Union    c4LTmp;
    tCIDLib::TCard4Union    c4RTmp;

    // The params are in and out parms, so get their initial values
    c4LTmp.c4Val = c4Left;
    c4RTmp.c4Val = c4Right;

    // Run the rounds
    c4LTmp.c4Val ^= m_ac4PArray[0];
    Round(c4RTmp, c4LTmp, 1);
    Round (c4LTmp, c4RTmp, 2);
    Round(c4RTmp, c4LTmp, 3);
    Round (c4LTmp, c4RTmp, 4);
    Round(c4RTmp, c4LTmp, 5);
    Round (c4LTmp, c4RTmp, 6);
    Round(c4RTmp, c4LTmp, 7);
    Round (c4LTmp, c4RTmp, 8);
    Round(c4RTmp, c4LTmp, 9);
    Round (c4LTmp, c4RTmp, 10);
    Round(c4RTmp, c4LTmp, 11);
    Round (c4LTmp, c4RTmp, 12);
    Round(c4RTmp, c4LTmp, 13);
    Round (c4LTmp, c4RTmp, 14);
    Round(c4RTmp, c4LTmp, 15);
    Round (c4LTmp, c4RTmp, 16);
    c4RTmp.c4Val ^= m_ac4PArray[17];

    c4Left = c4RTmp.c4Val;
    c4Right = c4LTmp.c4Val;
}
